The Bible speaks of sex within marriage as pure.
- Hebrews 13:4
Sex outside of marriage is immoral and adulterous according to Scripture.
- 1 Corinthians 6:13, 18; 10:8
- Galatians 5:19
- Ephesians 5:3
- Colossians 3:5
- 1 Thessalonians 4:3
God defined Marriage as the coming together as “one flesh”. If multiple “fleshes” are involved, one cannot love fully their spouse as God intended.
- Genesis 2:24
- Ephesians 5:31